Games like Spellarium 6
Games like Spellarium 6 include Librarian: Tidy Up the Arcane Library!, Zuma Deluxe, Bejeweled® 3, Hidden Folks, and Zup! S. We matched them by the tags players give Spellarium 6 on Steam (Casual, Match 3, Hidden Object, Card Game, and City Builder): closest matches first, and among equally close ones the better-known games.

Librarian: Tidy Up the Arcane Library!
Shared: Casual · Hidden Object · Puzzle

Zuma Deluxe
Shared: Match 3 · Casual · Puzzle

Bejeweled® 3
Shared: Casual · Match 3 · Puzzle

Hidden Folks
Shared: Casual · Hidden Object · Puzzle

Zup! S
Shared: Casual · Puzzle · 2D

PuzzleQuest: Challenge of the Warlords
Shared: Match 3 · Casual · Puzzle

Dorfromantik
Shared: Casual · Puzzle · City Builder

Is This Seat Taken?
Shared: Casual · Puzzle · Logic

Hexcells
Shared: Casual · Puzzle · Logic

A Little to the Left
Shared: Casual · Puzzle · Singleplayer

Zuma's Revenge!
Shared: Casual · Match 3 · Puzzle

Peggle Deluxe
Shared: Casual · Puzzle · 2D

Hidden Through Time
Shared: Casual · Hidden Object · Puzzle

Scribblenauts Unlimited
Shared: Casual · Puzzle · 2D

10,000,000
Shared: Match 3 · Casual · Puzzle

Sizeable
Shared: Casual · Hidden Object · Puzzle

Strange Jigsaws
Shared: Casual · Puzzle · 2D

Hook
Shared: Casual · Puzzle · 2D

Morphopolis
Shared: Hidden Object · Casual · Puzzle

Baba Is You
Shared: Puzzle · Logic · Singleplayer

Hexcells Infinite
Shared: Casual · Puzzle · Logic

Storyteller
Shared: Puzzle · 2D · Casual

Plants vs. Zombies GOTY Edition
Shared: Casual · 2D · Singleplayer

klocki
Shared: Casual · Puzzle · Logic